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Velocity
Horizontal component
Vertical component
Projectile motion
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100

What is the initial velocity in the y - direction for an object thrown horizontally from a cliff at 3m/s

What is ZERO!

100
The horizontal component is independent from____________________.
What is the vertical component
100
The main factor affecting vertical velocity is ___________.
GRAVITY
100

If a tennis ball takes 4.5 sec to reach its highest point, how long does it take to reach the other player?

9 seconds!

100
What happens to the velocity of and speed of an object as it is dropped from a cliff?  Be careful here...

velocity decrease, speed increase

200

If a ball is thrown straight up with a velocity of 5.8 m/s, what will its velocity be as it approaches the ground?

What is -5.8 m/s

200
True/False. The horizontal velocity is affected by gravity.
FALSE
200
TRUE/FALSE. The vertical velocity is unaffected by the horizontal velocity.
What is TRUE
200

True/False Increasing a projectile's mass will decrease the distance that it travels. 

FALSE

200

A baseball is dropped from the roof of a tall building.  If it takes 7 seconds for the ball to reach the ground, what is the height of the building?

240 meters

300

How do we find the x-component of velocity

What is cos(theta)

300

What angle will produce the maximum range of a projectile?

45 degrees

300
Where would a model rocket land if launched at an angle 79 degrees above horizontal with a velocity of 56m/s
What is 119.94m
300
How far from the base of a cliff does a rock land when thrown horizontally at 20 m/s from 30m high
49.49m
300
What is the path of a projectile called?
What is a trajectory
400

What are the x and y components of a velocity of 25m/s 32 degrees above horizontal?

what is x = 21.2 and y = 13.2

400
How much will the horizontal velocity change in 19.6 seconds?
None at ALL
400

What valuable information do you know about a projectile at the peak of its trajectory?

Vy=0 

Peak occurs at half of total time

400
At what other angle will a thrown ball go the same distance as one thrown 20 degrees?
70 degrees
400

An bowling pin is thrown upward with a velocity of 2.5 m/s.  What is the time to reach the maximum height AND the time to return to the ground.  

t1/2 = .255

t = 0.51

500

This component is found using sin(theta)

What is the Y velocity

500
If you were to throw a rock 4.3 m/s, horizontally, and drop another from the same height of 1m, which would hit the ground first? And how long would it take each one to hit the ground?
What is 0.45s, they both hit at the same time
500

Which angle would you choose to produce the longest flight time?

close to 90

500
A soccer is kicked at a goal with a velocity of 18 m/s at an angle 25 degrees above ground level. What is the furthest away the goal could be in order for him to make it?
What is 25.33m
500

What happens to vertical and horizontal accelerations of a projectile as it approaches its maximum height?

Vertical doesnt change.

Horizontal is zero and doesnt change.